diff --git a/textscreen/txt_fileselect.c b/textscreen/txt_fileselect.c
index 8fefc66c..42b6f42d 100644
--- a/textscreen/txt_fileselect.c
+++ b/textscreen/txt_fileselect.c
@@ -32,7 +32,7 @@ struct txt_fileselect_s {
     txt_widget_t widget;
     txt_inputbox_t *inputbox;
     int size;
-    char *prompt;
+    const char *prompt;
     const char **extensions;
 };